Closure device and method of making same



Feb. 17, 1948. LL, LES OY 2,436,312

CLOSURE DEVICE AND METHOD OF MAKING SAME Filed Aug. 24, 1945ZSheets-Sheet l lLawmnm, Lsa'voy; INVENTOR ATTORNEY I. L. LESAVOYCLOSURE DEUCE AND METHOD OF MAKING SAME Filed Aug. 24, 1945 2Sheets$heet 2 LLawmnca, Lasowox INVENTOR BY w ATTORNEY and.ire-spotting:

PatentedFeb. 11, 1948 PAT 2,436,312- otiostmirnEvIoE AND METHOD-F"MAKING SAME ls'adowliawrencej llesavoy, Allentown-,- .Ba:-.

sp liaatitni ugust 24, 1945; Serial No: 6123378 mi'Glaimsz- (01;215-38):

Thi's'i'nveritionrelates-t1)"oapsohcovers: fabrifcated of paper;cardboardlfihre and similar materials; for jars; Bottles and othercontainers: The invention moreparticulariy relates" to" the skirted typeof jar cover; havinga': turned-down skirt or" flange encircling thedpperportionsof the jar" contiguous to its: mouth;

One". of the objects" of: th'etinvention is: to" pro;- vide'apre-formedfcap 'blankiwhich may-be cheaply made, and quickly andeconomically, applied to cover. the mouths of jars andvother;containers. Another object is to provide a. skirted jar cover which whenapplied to the jahwil l'he held'securel'y in place bythe' tight-fitting"ofit's skirted portion. An allied .objectistoproyide a jar-"coverhaving: a peripheral portion; which. i s preeformed. and pre-spottedwithiadhesii'r eso that wheniold ed. over the mouth? of thajar itidrmsaiskirt havingv overlapping. portions. which are secured together bythev adhesive, inlati'g'htl-fitting manner to hold" the cap firmly-iii.place. Thisallied. object of the inventioniconte'rhplateszaejar coverwhich is pita-formed. and; prei-spottedi'with. ad hesive so that it. canbe formedulhtn. a tight-fit.- ting skirted typelof cap withoutlthezneediofnanpl'y ing adhesiveor moistiiie' toth'eQBIanK as. it. is heingformed into a tightl-fittihgicover far. the. jar. or other container.

A further object'oi method of pre-formihgia'ri can blanks and applyingthem to tight-fitting skirted typeof jar cover This object furthercontemplates the step oflprer-spotting the blank with. adhesive.fallied. obj eat. is todevise a methodofl pre-forming: jar, cap blanksand applying adhesive. w certain portions. thereof, the preforming of;thehlank V 'eing: such that all portions of the blank to "which:adhesive is. required to be: appliedtl willbe presentedlat one side? of;the blank, 503M135. the: adhesive.- -may be more facilel'yr appliedtmaisinglelsidee. of therblank to; coat all portions' of; the:Blank-required? to: be 1:o:e':-spotteii:'with.adliesili ez. A fun-the]:object. is to deviseiamethodi ofi preforiningtjar capihianks. thereofwith adhesive, so that the pre-formed and adhesive-coated Blanks maybestackeif wi'tiio'iit adhering toeach other. An allied olijectfis toprovide pre--formeci and pre coat'ed jar cap" Blanks" whibh maybestacked without" adhering? to" eachwther:

For the attainment'of foregoing and. such other objects as" may appearor he pointed out herein, two" embodiments: of the imientihil are shownnr-tneaccempafiymg 'di'awing's:

th'ezihyentionii'sto devise, a.

jars or other containers to form, a.

Referring-tattle drawings Figure 2 is: a plan 'viewofi a-blank in: theinitial:

2: state of pre-formingvacoording?tb".one: embodiment of'the invention;

Figure-3 isaplanivievwofithezblank oflFigure .21 inthe latter stagesofipreeformingiandjpreespote ting withadhesive'a Figure 4 isan:eniargedi perspective view of: a; portion of the" improved skirted. jar?cap: according' to the first embodiment of'the invention? Figure 5-isafront view ofi a containerhavingan improvedskirted jar cap-according tothe secondembodiment;of the iniv-entionii Figure 6 is a plan view ofabianhirrthexinitial: stage ofpre-fbrmi'ng t according: t'ow' the.second embodiment ofFigure 5;"

Figure 'lfisaplan view of the blank ofi Figure .8" in the latter stagesofi ing; and- Figure- 8 is a perspectiiie view o'fi aejav covered by theimproved skirted-cap according to: the first embodiment I as -iii Figure1')'-,-a tear being shownin the tympaitofithecapi In both formsof theinventiomaicincuiar'blank is employed; the ci-i oulan blanksu'se'diinzt'he embodiment of Figures" 1 3" is shoWn -'ih Figure 2 anddesignatedl2"; the circulanblanle'employe'd in the embodiment of-Figii es'-5 -7is? shoWm-in' Figure 6 and designated" 21". lieferrlhg first theembodiment of Figures 1-4; circular-"blank I 2 (Fig ure 2) is providedwithe'qui-spaeed radiallcuts l5 extending, a short d'lst-ance inwardlyfrom the periphery of the circular"?blah-k3 radial cuts l5 thus form'a." plurality of 'fia-ps, designatedl4 in Figure 2, aroundtheperipheryof the-blank; A concentric indicator line 6* enclosing" thecentralportion, l3 of the nianiemay be provided to aid in centering the'--pre'-formed blank' over the mouth of the jet" orflc'o'i'itaine'r".-

Alternate; ones. th fla'psi' W; Figure 2; are folded attheiruncutsides'to overilc the contiguous portions of the blank, thusforming-the ser rated blank' shown in Fi ure-3t- In the latter figurethe unfoldedfiaip's'aire designated. M as in Figure 2, Whilethefolde'dfiapsare designated H. The marginal portions l Baiong both radial sidesof the unfoldewfla'ps Wand the-n'iai'ginal portibns l9 along- B'othmater sides of the folded flaps l'l' are pre-spott'ed wi a coating ofad.- hesive. It will he seen" from; Figure- 3" that, I by reason of thefolding back of ael'ternat'e fiapsi IT); all portions of the pre-iformedhlank -r'equi red to be pre-coated -wlth aelheswfi- -iiaimelyi marginalre-fonminaamr preecoatg portions 18 and l9face upwardly, i. e., lie onone side of the pro-formed blank so that the adhesive applicator needoperate on only one side of the blank and all the coating operations maybe simultaneously performed in a single economical operation.

The adhesive used is of the type which will cause cohesion only betweentwo surfaces which have been coated therewith, i. e., a coated surfacewill not adhere to an uncoated one. Latex or a solut on of para rubberin gasoline have been found suitable for this purpose. By reason of theI employment of this type of adhesive and the manner of pre-forming andpre-coating the blanks as shown in Figure 3 so that the adhesive isapplied to only one side of the blank, the preformed blanks may bestacked-without adhering to each other.

In applying the pre-formed and pro-coated blank of Figure 3 to a jar orother container, it is placed over the mouth of the jar with the coatedside, Figure 3, upward; the concentric indicator line is facilitatescentering over the mouth of the jar. The unfolded flaps I 4 are thenbent downwardly against the sides of the jar to form the foundation forthe cap skirt. Then the folded flaps I! are straightened out and alsobent downwardly against the sides of the jar to complete the cap skirtby overlapping the previously bent-downwardly flaps M, as clearly shownin Figures 1 and 4 where the completed cap is designated H. In foldingor bending down the alternate set of flaps i4, i1, their coated marginaledges. respectively, I 8, l5, come into overlapping, bonding contact,thus forming a. tight-fitting skirt around the jar.

The circular blankii, Figure 6, employed in the embodiment of Figures5-7, differs from the blank 12 of Figure 2 in that the equi-spaced cuts24 are not radial but are tangent to the small dot-and-dash circle atthe center of the blank. As in the blank of Figure 2, blank 2! of Figure6 has a concentric indicator line 25 enclosing the central portion 22.The tangential cuts 24 form flaps 23 around the peripheryv of the blank.The corners 26, Figure 6, of each flap 23 is then bent and folded backto form triangular areas 27 (see Figure 7)., which overlie contiguousportions of the respective flaps. Adhesive coatings are then appliedalong the marginal portions 29 of the unfolded edge of the flaps andalong the marginal portions 28 of the triangular folded-back corners.The pro-formed and pre-coated blank of Figure '7 is applied to a jar inthe manner described above in connection with the blank, Figure 3, ofthe first form of the invention. The flaps 23 are first turned downagainst the sides of the jar, and the folded corners 21 are thenstraightened out to come into overlapping relation to the previouslyfolded flaps 23, to form'the completed skirt 20, as shown in Figure 5.The coated marginal portions 29, 28 are thus brought into overlapping,bonding contact to form a tight-fitting skirt about the jar. a d a Inthe accompanying drawings, the invention has been shown merely by way ofexample and in preferred form, but obviously many variations andmodifications may be made therein which will still be comprised withinits spirit. It is to be understood, therefore, that the invention is notlimited to any/specific form or embodiment, except insofar as suchlimitations are specified in the appended claims.

WhatI claim is: g

1. The method of making .a skirted type cap and then straightening 4 fora container comprising the steps of incising the periphery of a circularblank at spaced points with radially extending cuts to form a pluralityof peripheral flaps, folding alternate flaps back to overlie contiguousportions of the blank, applying adhesive to the obverse side of theunfolded flaps along marginal portions of their radial sides and to thereverse side of the folded-back flaps along marginal portions of theirradial sides, centering the pro-formed and pre-coated blank over themouth of the container, turning down the unfolded flaps against thesides of the container, and turning down the folded-back flaps againstthe side of the container in overlapping relation to the flaps firstturned down and with their said coated marginal portions in bondingcontact.

2. The method of making a skirted type cap for a container comprisingthe steps of incising the periphery of a circular blank at spaced pointswith cuts tangential to a circle of less diameter than that of the saidcircular blank to form a plurality of peripheral flaps, folding a cornerof the said flaps back to overlie contiguous portions thereof, applyingadhesive to the obverse side of the unfolded flaps and to the reverseside of the said folded-back corners, centering the preformed andpre-coated blank over the mouth of the container, turning down theunfolded flaps against the sides of the container, and .thenstraightening and turning down the folded-back corners against the sideof the container in overlapping relation to the flaps first turned downand with their said coated portions in bonding contact.

3. The method of making a skirted type cap for a container comprisingthe steps of incising the periphery of a circular blank at spaced pointsto form a slitted margin, folding back portions of the said slittedmargin of the blank,.applying adhesive to the obverse side of theunfolded portions of the slitted margin and to the reverse side of thesaid folded-back portion thereof, centering the pre-formedj andpre-coated blank over the mouth of the container, turning down theunfolded marginal portions against the sides of the container, and thenstraightening and turning down the folded-back portions of the slittedmargin against the side of the container in over1apping relation to theportions first turned down and with their said coated surfaces'inbonding contact.

4. The method of making a, skirted type cap comprising the steps ofincising the periphery of a circular blank at spacedpoints with radiallyextending cuts to form a plurality of peripheral flaps, foldingalternate flaps back to overlie contiguous portions of the blank,applying adhesive to the obverse side of the unfolded flaps alongmarginal portions of their radial sides and to the reverse side of thefolded-back flaps along marginal portions of their radial sides, turningdown the unfolded flaps, and then straightening and turning down thefolded-back flaps in overlapping relation to the flaps first turned downand with their said coated marginal portions in bonding contact.

5. The method of making a skirted type cap comprising the steps ofincising the periphery of a circular blank at spaced points with cutstangential to'a circle of less diameter than that of the said circularblank to form a plurality of peripheral flaps, folding a corner or the.said flaps back to overlie contiguous portionsthereof, applying adhesiveto the'obverse side of the unflaps and then straightening folded flapsand to the reverse side of the said folded-back corners, turning downthe unfolded and turning down the folded-back corners in overlappingrelation to the flaps first turned down and with their said coatedportions in bonding contact.

6. The method of making a preformed and pre-spotted blank for a skirtedtype cap comprising the steps of incising the periphery of a circularblank at spaced points with radially extending cuts to form a pluralityof peripheral flaps, folding alternate flaps back to overlie contiguousportions of the blank, applying adhesive to the obverse side of theunfolded flaps along marginal portions of their radial sides and to thereverse side of the folded-back flaps along marginal portions of theirradial sides:--'

7. The method of making a pre-formed' and pre-spotted blank for askirted type cap comprising the steps of incising the periphery of a ancircular blank at spaced gential to a the said circular blank to form aplurality of peripheral flaps, folding a corner of the said flaps backto overlie contiguous portions thereof, applying adhesive to the obverseside of the unfolded flaps and to the reverse side of the foldedbackcorners.

8. The method of making a pre-formed and pre-spotted blank for a skirtedtype cap comprising the steps of incising the periphery of a circularblank at spaced points to form a slitted margin, folding back portionsof the said slitted margin, applying adhesive to the obverse side of theunfolded portions of the slitted margin and to the reverse side of thesaid folded-back portions thereof.

9. The method of making a pre-formed and pre-spotted blank for a skirtedtype cap compoints with cuts tancircle of less diameter than that ofprising the steps of incising the periphery of a circular blank atspaced points to form a slitted margin, folding back portions oftliesaid slitted margin, and applying adhesive to: one face thereof tosimultaneously coat parts of the ob 'verse side of the unfolded portionsofthe slitted margin and of the reverse side of the'said foldedbackportions thereof.

10. A circular blank for forming into a skirted type cap for containersprovided atspaced points about its periphery with radially extendingslits, alternate peripheral portions between said slits being foldedback to overlie contiguous portions of the blank, presenting a serratedperiphery, marginal portions of the obverse side of the unfoldedperipheral portions and of the reverse side being coated with aselfwhereby the said blanks may adhering to the underside ofcohesivel'sulistance, be stacked without overlying blanks.

I. LAWRENCE LESAVOY.

REFERENCES CITE!) The following references are of record in the file ofthis patent:

